// Copyright 2023 The Perses Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import { VariableStateMap } from './variables';

export function filterVariableStateMap(v: VariableStateMap, names?: string[]): VariableStateMap {
  if (!names) {
    return v;
  }
  return Object.fromEntries(Object.entries(v).filter(([name]) => names.includes(name)));
}

/**
 * Returns a serialized string of the current state of variable values.
 */
export function getVariableValuesKey(v: VariableStateMap): string {
  return Object.values(v)
    .map((v) => JSON.stringify(v.value))
    .join(',');
}
